If you could show a movie to people in the 1970s to show how far we’ve come in terms of special FX/CGI

What movie would you show people in the 1970’s that would absolutely blow their mind? I remember the first superman and the wire harness/ropes that helped fly. Imagine showing them an updated superman film lol. Heck even avengers would cover space exploration, flying, transformation, aliens. Interstellar? 🤔

Would they love it or would they be too overwhelmed?